Non-isomorphic proper colorings of the 3 X 3 grid graph using at most n colors under rotational and reflectional symmetries.

A321244

Non-isomorphic proper colorings of the 3 X 3 grid graph using at most n colors under rotational and reflectional symmetries.

Terms

    a(0) =0a(1) =2a(2) =69a(3) =1572a(4) =19865a(5) =153480a(6) =830802a(7) =3476144a(8) =12003462a(9) =35757630a(10) =94780235a(11) =228579252a(12) =509929719a(13) =1065625652a(14) =2106541920a(15) =3969848640a(16) =7176749852a(17) =12509692794a(18) =21113614017a(19) =34626453860a(20) =55344881445a(21) =86431928352a(22) =132174030494a(23) =198295824432a(24) =292341936450a(25) =424135940150a(26) =606327641127a(27) =855040875444

External references